A relative clause can be restrictive or nonrestrictive (essential or nonessential) Restrictive relative clauses restrict or define the meaning of a noun and are not set apart by commas. If the clause ...

A relative clause starts with a relative pronoun (who, that, which, whose, where, when) and is often added to a sentence to define a noun.

A relative clause starts with a relative pronoun (who, that, which, whose, where, when) and is often added to a sentence to define a noun.